GB1565432A - Creation of Inventions and Patents with Artificial Intelligence

GB1565432A – Cable making apparatus
– Google Patents

GB1565432A – Cable making apparatus
– Google Patents
Cable making apparatus

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Publication number
GB1565432A

GB1565432A
GB31401/77A
GB3140177A
GB1565432A
GB 1565432 A
GB1565432 A
GB 1565432A
GB 31401/77 A
GB31401/77 A
GB 31401/77A
GB 3140177 A
GB3140177 A
GB 3140177A
GB 1565432 A
GB1565432 A
GB 1565432A
Authority
GB
United Kingdom
Prior art keywords
core
pay
axis
outer strand
strand
Prior art date
1976-07-29
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Expired

Application number
GB31401/77A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Tatsuta Electric Wire and Cable Co Ltd

Original Assignee
Tatsuta Electric Wire and Cable Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1976-07-29
Filing date
1977-07-26
Publication date
1980-04-23

1977-07-26
Application filed by Tatsuta Electric Wire and Cable Co Ltd
filed
Critical
Tatsuta Electric Wire and Cable Co Ltd

1980-04-23
Publication of GB1565432A
publication
Critical
patent/GB1565432A/en

Status
Expired
legal-status
Critical
Current

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Classifications

D—TEXTILES; PAPER

D07—ROPES; CABLES OTHER THAN ELECTRIC

D07B—ROPES OR CABLES IN GENERAL

D07B3/00—General-purpose machines or apparatus for producing twisted ropes or cables from component strands of the same or different material

D—TEXTILES; PAPER

D07—ROPES; CABLES OTHER THAN ELECTRIC

D07B—ROPES OR CABLES IN GENERAL

D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines

D07B7/02—Machine details; Auxiliary devices

D07B7/021—Guiding means for filaments, strands, ropes or cables

D—TEXTILES; PAPER

D07—ROPES; CABLES OTHER THAN ELECTRIC

D07B—ROPES OR CABLES IN GENERAL

D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines

D07B7/02—Machine details; Auxiliary devices

D07B7/14—Machine details; Auxiliary devices for coating or wrapping ropes, cables, or component strands thereof

D—TEXTILES; PAPER

D07—ROPES; CABLES OTHER THAN ELECTRIC

D07B—ROPES OR CABLES IN GENERAL

D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines

D07B7/02—Machine details; Auxiliary devices

D07B7/04—Devices for imparting reverse rotation to bobbin- or reel cages

Description

PATENT SPECIFICATION
( 11) 1 565432 ( 21) Application No 31401/77 ( 22) Filed 26 July 1977 ( 31) Convention Application No.
51/091 736 ( 32) Filed 29 July 1976 in Japan (JP) Complete Specification published 23 April 1980
INT CL 3 DO 7 B 3/08 7/16 Index at acceptance D 1 T 2 B 1 A 2 2 B 2 2 85 2 B 9 Inventors SHINICHI TERASAWA AKITOSHI OKAMURA SHIGERU OKUYAMA TAKEHIKO NISHIYAMA TADAO NISHIDA ( 54) CABLE MAKING APPARATUS ( 71) We, TATSUTA DENSEN KABUSHI Ki KAISHA, a company organized and existing under the laws of Japan, of 3-1, Iwata-Cho 2-Chome, Higashi-Osaka-Shi, Osaka-Fu, Japan, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:This invention relates to cable-making apparatus, and more specifically to apparatus for assemblying a cable by laying outer strands around an axial core while imparting reversing or pre-twist thereto.
Still more specifically, the invention is directed to some improvements in such cable-making apparatus which are intended to afford a uniform distribution of pretwists through-out the lengths of the outer strands and the core from respective payout means to a laying die.
Cables are in use which have an axial core of a multiplicity of layed wires and an outer layer comprising a plurality of strands each composed also of a number of wires In conventional apparatus for the manufacture of such cables, the above cable components are fed from respective pay-out reels or drums to a laying die while being pre-twisted On emerging from the die, the laid assembly of the outer strands around the core is taken up around a take-up reel or drum.
A problem in this known type of cablemaking apparatus is that the pre-twists imparted to the individual cable components are not uniformly distributed along their lengths from the respective pay-out reels to the laying die The pre-twists tend to accumulate at those portions of the cable components laying immediately next to the pay-out reels, until the resulting kinks are swept forwardly Cables produced in this manner lack uniformity in pitch and diameter along their length.
For guiding the outer strands from their pay-out reels to the laying die, for example, the prior art apparatus employs large-diameter pulleys in engagement with 50 respective strands These pulleys are serious impediments to the uniform distribution of the pre-twists through-out the outer strands Rollers disposed along the path of the core from its pay-out reel to 55 the laying die in the prior art apparatus are also unsatisfactory for assuring uniform distribution of the pre-twist through the core.
Japanese Patent Publication No 36052/ 6 ( O 1974 discloses the use of concave rollers for guiding each strand or the assembled cable around a circuitous path while inducing the same to rotate about its own axis These concave guide rollers, how 6:
ever, are intended for use in cable-making machines of the “caged” or revolving frame type to which the noted Japanese patent is directed, with the rollers mounted in a revolving frame Such concave rollers 70 have proved quite unsatisfactory when employed for guiding each outer strand along a stationary, curved path in cable-making apparatus of the type to which the instant invention is directed 75 When incorporated in cable-making apparatus of the revolving frame type, the concave rollers are admittedly capable of effectively guiding a strand or a cable while inducing its rotation about its axis, thanks 80 to a centrifugal effect exerted thereon.
When employed for guiding a pre-twisted strand along a stationary, curved path, however, the concave rollers do not permit uniform distribution of the pre-twist 85 through-out the strand length This is primarily because the angle between the axis of each concave roller and its circumference increases too rapidly from the midpoint toward the outer ends thereof 90 ir ( 33) ( 44) ( 51) ( 52) ( 72) 1 565 432 Another problem in the prior art is that such guide rollers are made of metal such as steel with or without chromium plating.
Such metal-made guide rollers do not offer sufficient frictional resistance to the strand travelling thereover for efficient distribution of the pre-twist therethrough.
In accordance with this invention, there is provided apparatus for assemblying a cable by laying outer strands around a core, wherein the apparatus is of the type including core pay-out means and cable take-up means rotatable in the same direction about a common stationary first axis and further rotatable about revolving second axes transverse to the first axis for paying out the core and taking up the assembled cable, respectively, a plurality of outer strand pay-out means each rotatable about a stationary third axis and each further rotatable about a revolving fourth axis transverse to the third axis for paying out one of the outer strands, and a stationary laying die disposed on the first axis between the core pay-out means and the cable take-up means for receiving and passing therethrough the outer strands and the core so as to assemble the former around the latter, said apparatus comprising means for guiding the core from the core pay-out means to the laying die substantially along the first axis, the core guiding means including means for uniformly distributing a pre-twist, which is imparted to the core by the rotation of the core pay-out means about the first axis, throughout the length of the core from the core pay-out means to the laying die, and means for guiding each outer strand from one of the outer strand pay-out means to the laying die along a path having a curve therein, the outer strand guiding means including a series of interspaced, linearly tapering rollers disposed along the curve in the path of each outer strand and held in engagement therewith, at least some of the tapered rollers being each set at an angle to the direction transverse to the axial direction of the outer strand being fed thereover, whereby a pre-twist imparted to each outer strand by the rotation of one of the outer strand pay-out means about the third axis is uniformly distributed throughout the length of the outer strand from the outer strand pay-out means to the laying die.
An embodiment of cable-making apparatus to be described herein has means for affording uniform distribution of pre-twists throughout the lengths of cable components from respective pay-out means to the laying die and hence enable efficient manufacture of cables without objectionable variations in thickness or pitch Such means can be readily incorporated in known cable-making apparatus without major alteration of its existing parts.
By the tapered guide rollers, which preferably are molded of polyurethane rubber or like material, the pre-twist imparted to 70 each outer strand is uniformly distributed through-out its length from the pay-out means to the laying die Clear distinction should be made between the tapered rollers of this invention and the concave 75 rollers of the prior art The diameter of each tapered roller in accordance with the invention decreases linearily, for example from its opposite ends toward the midpoint or from one of its ends towards the other 80 In the preferred embodiment to be described herein, a series of interspaced pairs of opposed guide rollers are disposed along the path of the core so as to engage the same therebetween 85 Thus, in accordance with the invention, pre:twists imparted to the outer strands and the core are uniformly distributed through-out their lengths from the respective pay-out means to the laying die 90 Outer strands are therefore assembled around the core to form a closely twisted, defectless cable.
Said embodiment of the invention will now be described, by way of example only, 95 with reference to the accompanying drawings, in which:
FIG 1 is a schematic side elevational view of conventional cable-making apparatus having particular pertinence to this 100 invention; FIG 2 is a similar view of cable-making apparatus incorporating the improvements in accordance with the invention; FIG 3 is a plan view, on an enlarged 105 scale, showing a cable take-up reel and its associated parts; FIG 4 is a fragmentary relatively enlarged side elevation, partly broken away and partly in section, of the cable-making 110 apparatus of FIG 2, the view showing in particular means for guiding a cable core from a pay-out reel toward a laying die while affording uniform distribution of a pre-twist therethrough; 115 FIG 5 is a fragmentary vertical sectional view showing, on a still further enlarged scale, a guide die and associated means seen in FIG 4; FIG 6 is an enlarged sectional view 120 taken along the line VI-VI in FIG 4; FIG 7 is an enlarged sectional view taken along the line VII-VII in FIG 4; FIG 8 is an enlarged elevational view, partly in section, of one of outer strand 125 pay-out reels and means for revolving the same about a vertical axis in the cablemaking apparatus of FIG 2; FIG 9 is an enlarged elevational view of the means for guiding each outer strand 130 1 565 432 along a curve present in its path from the pay-out reel to the laying die so as to afford uniform distribution of a pre-twist therethrough, in the cable-making apparatus of FIG 2; FIG 10 is a perspective view of the outer strand guiding means of FIG 9, the view not showing the supporting and mounting means of tapered guide rollers included in the guiding means; FIG 11 is a still further enlarged sectional view, partly broken away, which is taken along the line XI-XI in FIG 9, and which shows one of the tapered guide rollers together with its supporting and mounting means; FIG 12 is a plan view explanatury ot the angular position of each tapered guide roller with respect to the axial direction of the outer strand being fed thereover; FIG 13 is a view similar to FIG 11 but explanatory of the angular position of each tapered guide roller with respect to the direction normal to the vertical plane containing the curve in the path of the outer strand; FIG 14 is a schematic plan view explanatory of the angular orientations of all tapered guide rollers with respect to the axial direction of the outer strand being fed thereover; FIG 15 is a series of views explanatory of the angular orientations of all tapered guide rollers with respect to the direction normal to the vertical plane containing the curve in the outer strand path; FIG 16 is a curve of a modified tapered guide roller which can be used in the outer strand guiding means of FIGS 9 and 10; FIG 17 is an enlarged, vertical sectional view of the laying die in the cablemaking apparatus of FIG 2, the view also showing the core and the outer strands being fed through the die and assembled into a cable; and FIG 18 is a cross section of the cable.
The prior art cable-making apparatus of
FIG 1, to which the improvements of this SO invention can be applied to the best advantage, will first be described briefly in order to make clear the features and advantages of the invention In this type of apparatus, a core C is delivered by a core SS pay-out reel or drum 1 and is passed horizontally through a guide die 2 and a series of guide rollers 3, into and through a stationary laying die 4 A plurality of outer strands S, to be laid around the core C at the laying die 4, are delivered substantially vertically upwardly by respective outer strand pay-out reels or drums 5, passed around respective large-diameter guide pulleys 6, and directed downwardly into and through the laying die 4 at angles to the die axis.
The core pay-out reel 1 is rotatable about a horizontal axis in alignment with the axis of the guide die 2 and also with that of the laying die 4, for imparting a reverse 70 or pre-twist to the core C Each outer strand payout reel 5 is also further rotatable about a vertical axis for imparting a pre-twist to one of the outer strands S.
The laying die 4 is adapted to permit the 75 core C and the outer strands S to slide axially therethrough but to resist the rotation of the same about their axes After having passed through the laying die 4, the pre-twisted outer strands S are laid 80 around the core C released from the pretwist.
On issuing from the laying die 4, the laid or assembled cable CS is passed horizontally into and through another guide 85 die 7 and is then wound up around a cable take-up reel or drum 8 This cable take-up reel is also further rotated about the horizontal axis in the same direction and at the same angular velocity as the core pay 90 out reel 1.
In the cable-making apparatus of the above outlined type, the uniform distribution of pre-twists through-out the entire lengths of the core C and outer strands 95 S from the respective pay-out reels 1 and to the laying die 4 are of utmost importance for the manufacture of a cable having uniform quality and freedom from defects As explained earlier, this objec 100 tive cannot fully be attained by the rollers 3 or pulleys 6 (or by the concave rollers of the aforementioned Japanese Patent Publication No 36052/1974) heretofore employed for guiding the core and outer 105 strands from their pay-out reels to the laying die.
These shortcomings are totally absent from the improved cable-making apparatus of this invention illustrated in its entirety 110 in FIG 2 In the following description of this improved cable-making apparatus, some conventional parts are designated by the same reference numerals as those used to denote corresponding parts in the prior 115 art apparatus of FIG 1.
As in the illustrated prior art, the improved cable-making apparatus of FIG.
2 comprises the core pay-out reel 1 and the cable take-up reel 8 which are rotated 120 in the same direction as indicated by the arrows and at the same angular velocity about a common, stationary first or horizontal axis A-A, and which are further rotatable about respective second or trans 125 verse axes revolving in vertical planes, the each of the outer strand pay-out reels 5 being rotatable about a stationary third or vertical axis and each further being rotatable about a fourth axis revolving in a 130 1 565 432 horizontal plane, and the fixed laying die 4 disposed on or around the horizontal axis A-A between the reels 1 and 8 for laying the outer strands S around the core C into the cable CS.
Additionally, the improved cable-making apparatus of FIG 2 comprises core guide means 9 for guiding the core C from the pay-out reel 1 toward the laying die 4 substantially along the horizontal axis A-A so as to permit uniform distribution of a pre-twist throughout the core length from the pay-out reel to the laying die and outer strand guide means 10 employed in place of the conventional guide pulleys 6 for permitting uniform distribution of pretwists through the lengths of the outer strands S from the respective pay-out reels to the laying die 4 Each of the core C and outer strands S usually comprises a multiplicity, or plurality, of stranded wires.
The core pay-out reel 1 is rotatably supported at a bifurcated end of a drive shaft 11 which is journalled in a bearing supported by a reel mount 12 for rotation about the horizontal axis A-A The other end of the drive shaft 11, projecting rearwardly of the reel mount 12, is connected to the output shaft of an electric motor M 1 via a chain drive 14 The cable take-up reel 8 is rotatably supported by a frame 13 which is carried by a rotary ring 13 a resting on rollers 15 so as to be rotatable around the axis A-A, as also shown in FIG 3 The reel 8 itself is driven in rotation by an electric motor M 2 mounted on the frame 13 via a chain drive 16 The frame 13 has fixedly connected thereto another rotary ring 13 b rotatably resting on a pedestal 17 The frame 13 further has a guide die 7 which is driven in rotation with the frame 13 by means of an electric motor M 3 via a chain drive 18.
The core pay-out reel 1 and the cable take-up reel 8 can therefore be rotated about the common axis A-A by the respective motors M 1 and M 3.
It will be noted that the motor M 2 rotates the cable take-up reel 8 in the counterclockwise direction as viewed in FIG 2, or cable take-up direction, about the revolving transverse axis Preferably, still another electric motor, not shown, is provided for rotating the core pay-out reel 1 in the counterclockwise or core pay-out direction about the revolving transverse axis.
The core guide means 9 includes an elongated, revolving guide frame 19 extending along the horizontal axis A-A and located between the core pay-out reel 1 and the laying die 4 to provide therein a passage through which the core C is fed forwardly from the reel toward the die.
The guide frame 19 is supported at the two ends by a pair of upstanding standards 20 for rotation about the axis A-A.
As illustrated on an enlarged scale in FIG 4 and on a still further enlarged scale in FIG 5, the guide frame 19 ter 70 minates at both ends in hollow shafts 21.
The rear or right hand one of these hollow shafts is journalled in a bearing 22 supported by one of the standards 20 and has a guide die 23 fixedly mounted therein for 75 somewhat loosely receiving and passing the core C through the die An electric motor M 4 is disposed within the right hand standard 20 and has its output shaft coupled to the hollow shaft 21 via a chain 80 drive 25 for imparting rotation, in the direction indicated by the arrows, to the guide frame 19 about the horizontal axis A-A.
Although not seen in FIGS 4 and 5, 85 the hollow shaft at the front or left hand end of the guide frame 19 is similarly supported in a bearing on the associated standard 20 Additionally, another electric motor MS is disposed within the left hand 90 a standard 20 for imparting rotation to the guide frame 19 via a chain drive 25 The two motors M 4 and MS are adapted to drive the guide frame 19 in the same direction and at the same angular velocity as 95 the core pay-out reel 1 and the cable takeup reel 8 about the common horizontal axis A-A.
FIGS 4 and 6 illustrate a series of constantly spaced-apart pairs of opposed core 100 guide rollers 26 disposed within the revolving guide frame 19 in order to afford uniform distribution of a pre-twist through the core length extending within the guide frame The core guide rollers 26 are shown 105 as plain cylinders, and as clearly seen in FIG 6, each pair of guide rollers are rotatable relative to the guide frame 19 about parallel spaced axes, respectively, revolving in a vertical plane transverse to 110 the axis A-A The pre-twisted core C is caught under some pressure between each pair of guide rollers 26.
FIG 4 is further illustrative of another feature of this invention which resides in 115 means 27 for uniform distribution of the pre-twist through the core length extending from the pay-out reel 1 to the entrance end of the revolving guide frame 19 or of its right hand end hollow shaft 21 The 120 means 27 includes an elongated support member 28 pivotally coupled to the entrance end of the right hand hollow shaft 21 via a universal joint 29 and extending therefrom toward the core pay-out reel 1 125 along the core C.
As will be seen from the enlarged sectional view given in FIG 7, the support member 28 supports a series of constantly interspaced pairs of opposed core guide 130 1 565 432 rollers 30 via devises 31 The support member 28 is shown to be in the form of a tube, and the U-shaped devises 31 are suitably secured to the support member at their bight portions so as to embrace the core C extending therealong Preferably concave in shape, each pair of core guide rollers 30 are supported by one of the devises 31 via parallel spaced crosspins 32 for rotation relative to the clevis about the crosspin axes transverse to the axis of the core length between the core pay-out reel 1 and the entrance end of the right hand hollow shaft 21 The pre-twisted core C is caught under pressure between each pair of concave guide rollers 30.
On close observation of the core C being unwound from the pay-out reel 1 while being pre-twisted by the reel rotation about the horizontal axis A-A, it is clear that the pre-twist tends to accumulate at the core region lying immediately next to the reel In view of this, therefore, the rearmost one of the concave core guide roller pairs 30 may be disposed as close as possible to the core pay-out reel 1 For practical purposes, however, the distance D between the rearmost pair of guide rollers 30 and the point at which the core C is paid out from the pay-out reel 1 should be less than twice the pitch of the pre-twist imparted to the core.
A counterweight 33 extends forwardly from the universal joint 29 to counterbalance the total weight of the support member 28, core guide rollers 30 and other means mounted on the joint Further, a dummy 34 of the support member 28 extends rearwardly from the universal joint 29 at an angle to the horizontal axis A-A and in opposed relation to the support member The far end of the dummy 34 is coupled to the corresponding end of the support member 28 via a coil spring 15 in order to minimize the centrifugal effect on the core guide rollers 30 during operation of the cable-making apparatus.
Preferably, the universal joint 29 should be provided with means for limiting the SO latitude of the pivotal motion of the support member 28 with respect to the hollow shaft 21 in such a way that the support member is pivotable through an angle corresponding to the spacing between the pair of flanges 36 of the core pay-out reel 1 and through an angle corresponding to the difference between the maximum and minimum diameters of the coil of core C on the reel It is also preferable that the sunport member 28 be made of several unitary sections which can be readily interconnected with or disconnected from each other in order to adjustably vary the total length of the support member as required.
Thus, as the core pay-out reel 1 is rotated as aforesaid about the horizontal axis A-A by the motor M 1 and further about its transverse axis, the pre-twist imparted to the core C being delivered from 70 the pay-out reel is uniformly distributed along the lengths of core up to the entrance end of the right hand hollow shaft 21 by the series of concave guide roller pairs 30.
Since the guide frame 19 together with the 75 pair of hollow shaft 21 at its opposite ends is rotated as aforesaid about the horizontal axis A-A by the motors M 4 and M 5 in step with the pay-out reel 1, and since the pairs of concave guide rollers 30 are 80 coupled to the right hand hollow shaft 21 via the support member 28 and the universal joint 29, the guide roller pairs can be maintained in positive engagement with the core C in synchronization with the 85 rotation of the pay-out reel about the axis A-A and from the start to the end of the unreeling of the core coil on the reel.
The pre-twist is further uniformly distributed from the guide die 23 through 90 the core length within the revolving guide frame 19 by the series of guide roller pairs 26 mounted therein It is thus seen that the pre-twist imparted to the core C is uniformly distributed through-out the 95 complete length of the core extending from the core pay-out reel 1 to the laying die 4.
FIG 8 illustrates in detail one of the outer strand pay-out reels 5 and associated means It is understood that the other 100 reels are constructed and arranged identically Carrying a coil of outer strand S, the illustrated pay-out reel 5 is mounted on a shaft 37 rotatable in bearings mounted on uprights 38, respectively, that are 105 erected on a turntable 39 This turntable is disposed at the floor level and is rotatably supported by suitable means 40 mounted in an underground chamber 41.
Also mounted in the chamber 41, an elec 110 tric motor M 6 has a pinion 42 fixedly mounted on its output shaft and meshing through a gear 43 with an annular rack 44 fixed to the underside of the turntable 39 115 Upon rotation of the motor M 6, therefore, the outer strand pay-out reel 5 is rotated about the afore-mentioned third or vertical axis together with the turntable 39 via the rack-and-pinion mechanism 120 The pay-out reel itself is further rotatable about the fourth axis revolving in a horizontal plane If desired or required, a separate motor may be provided for driving the pay-out reel 5 in the strand unreeling 125 direction.
FIGS 9 and 10 are enlarged representations of the outer strand guide means 10 intended to afford uniform distribution of pre-twists, which are imparted to the outer 130 1 565 432 strands S by the rotation of the respective pay-out reels 5 about the vertical axes, through the full outer strand lengths from the pay-out reels to the laying die 4 The guide means 10 includes a guide frame 45 having a curved edge 46 extending along a curve which must he present in the path of travel of each outer strand S from one of the pay-out reels 5 to the laying die 4.
The guide frame 45 is fixedly mounted by brackets 47 and 48 on an elevated platform 49 supported by two or more columns shown in FIG 2 The radius of curvature at any point on the guide frame edge 46 should not be so small as to hamper the desired uniform distribution of the pre-twist through-out the length of outer strand S from its reel 5 to the die 4.
Mounted on and extending along the curved edge 46 of the guide frame 45 are a series of interspaced cuter strand guide roller assemblies 51 including tapered rollers 52 As illustrated in greater detail in FIG 11, the tapered roller 52 of each guide roller assembly 51 is free to turn about a crosspin 53 supported by a clevis 54 This clevis is mounted on a shaft or rod 55 via a knuckle joint 56 including a lock bolt 57, and the shaft 55 is slidably fitted in a sleeve 58 which is fastened to the guide frame 45 as by means of eyebolts 59 One or more setscrews 60 extend through tapped holes in the sleeve 58 for locking the shaft 55 against movement in a desired angular position with respect to the sleeve.
The outer parts of the tapered rollers 52 are made of an elastomer such as polyurethane or polyester rubber, or of any such material capable of offering higher frictional resistance than metal to the outer strand S being fed thereover In shape, each tapered roller 52 decreases linearly in diameter from its opposite ends toward the midpoint and is thus shaped like two cone frustroms joined together at their reduced diameter ends and in axial alignment The ratio of the minimum to the maximum diameter of each tapered roller 52 is from about 115 to about 2/3, preferably about 2/5 It has been ascertained by experiment that tapered rollers whose diameter ratios are outside of this range tend to cause distortion, disarrangement, or lateral displacement of the pre-twisted outer strand S travelling thereover.
The guide roller assemblies 51 constructed as described above are set up on and along the curved edge 46 of the guide frame 45, with their tapered rollers 52 in engagement with one of the outer strands S extending substantially vertically upwardly from the corresponding pay-out reel via a guide roller 61 and an opening 62 in the platform 49 In this particular example, the spacings between the tapered rollers are less than about 200 millimeters, preferably about 100 millimeters.
As best shown in FIG 12, at least some of the tapered rollers 52 are set at an 70 angle a relative to the direction transverse to the axial direction of the outer strand S travelling thereover Preferably, as shown in FIG 13, at least some of the tapered rollers 52 should further be set at 75 an angle b relative to the direction normal to the vertical plane containing the curved edge 46 of the guide frame 45 FIGS 14 and 15 are explanatory of such angular orientations of all tapered rollers 52 on 80 the guide frame 45.
With the tapered rollers 52 of the guide roller assemblies 51 arranged as described above on the curved edge 46 of the guide frame 45, the outer strand S in its axial 85 motion imparts rotation to each tapered roller, resulting in the creation of a frictional force component which acts on the outer strand to displace the same toward the larger diameter end 52 ‘ shown in FIG 9012 As a consequence, the outer strand S is caused to turn about its axis as indicated by the arrow x in FIG 12 It will be understood that such a force component induces the rotation of the strand about its axis 95 and hence enables uniform distribution of a pre-twist through the strand from one tapered roller to the next toward the laying die 4 It is to be noted that the inclined arrangement of the rollers 52 at the angle 100 b is also useful in inducing the rotation of the strand in the direction of the arrow x.
As the strand climbs up the tapered surface of the r Q 11 er 52, the tension of the strand increases and hence the strand tends 105 to move down the tapered surface to relieve itself of the high tension, which tendency causes the strand to turn in the direction c f the arrow x.
It will be seen that the tapered rollers 11 ( 52 need not be all set at the same angles a and b Indeed, in the illustrated embodiment, these angles must be greater at the mid-portion of the guide frame edge 46 where the radius of curvature is the 115 smallest, than at the entrance and exit end portions of the guide frame edge which are curved ever so slightly or hardly curved at all Generally speaking, the angle a between the axis of each tapered roller 52 120 and the direction transverse to the axial direction of the outer strand S being fed thereover can range from -0 to about 13 degrees, and the angle b between the tapered roller axis and the direction normal 125 to the vertical plane containing the guide frame edge 46 can range -from 0 to about 23 degrees Such angular dispositions of the tapered rollers 52 can be easily ad justed as required by manipulation of the 130 1 565 432 lock bolts 57 and the setscrews 60 of the outer strand guide roller assemblies 51.
Preferably, the total length of those portions of each outer strand S which are in contact with the series of tapered rollers 52 at every moment should be more than twice the pitch of the pre-twist of the strand Further, the angle of the front slope of each guide frame edge 46 should be approximately the same as the angle at which the corresponding outer strand S is fed into the 1 aying die 4.
As will be seen from the foregoing description of the functions of the tapered rollers 52, only the upper halves, as seen in FIGS 12, 14 and 15, or these rollers serve for uniform distribution of the pret Wist through the outer strand S Each tapered roller can therefore be provided in the shgpe of a simple cone or its frustum, as illustrated in FIG 16 and designated at 52 a It has been ascertained that a strand travelling over such conical or frustoconical rollers will not easily slip off the reduced diameter end of each roller, either when the cable-making apparatus is in operation or when it is at rest.
FIG 17 illustrates in detail the laying die 4 fixedly mounted in an upstandinstandard 63, together with the core C and the outer strands $ being fed into the die in the process of assemblage into the desired cable CS On issuing from the laying die 4, the assembled core C and outer strands S are freed from the pre-twists which have been applied thereto and are formed into the closely laid or twisted cable.
Since the pre-twists are uniformly transmited through the entire lengths of the cable components from the respective payout reels 1 and 5 to the laying die by the improved means of this invention, a cable CS of improved characteristics including greater uniformity in diameter and pitch can be manufactured The method of assemblage of the pre-twisted core and outer strands into the cable is per se conventional and will therefore be not described in any greater detail.
With reference back to FIG 2, the assembled cable CS is fed from the laying die 4 to the conventional guide die 7 which is in constant rotation about the horizontal axis A-A with a frame 13 connecting the guide die 7 to the cable take-up reel 8.
Issuing from the guide die 7, the cable CS is taken up by and coiled around the cable take-up reel 8, which is in rotation not only about the transverse axis but also about the axis A-A The cross-section of the cable CS thus assembled is as shown in FIG 18.

Claims (14)

WHAT WE CLAIM IS: –

1 Apparatus for assemblying a cable by laying outer strands around a core, wherein the apparatus is of the type including core pay-out means and cable take-up means rotatable in the same direction about a common, stationary first axis 70 and further rotatable about revolving second axes transverse to the first axis for paying out the core and taking up the assembled cable, respectively, a plurality of outer strand pay-out means each rotatable 75 about a stationary third axis and each further rotatable about a revolving fourth axis transverse to the third axis for paying out one of the outer strands, and a stationary laying die disposed on the first 80 axis between the core pay-out means and the cable take-up means fpr receiving and passing therethrough the outer strands and the core so as to assemble the former around the latter, said apparatus compris 85 ing means for guiding the core from the core pay-out means to the laying die substantially along the first axis, the core guiding means including means for uniformly distributing a pre-twist, which is 90 imparted to the core by the rotation of the core pay-out means about the first axis, through-out the length of the core from the core pay-out means to the laying die.
and means for guiding each outer strand 95 from one of the outer strand pay-out means to the laying die along a path having a curve therein, the outer strand guiding means including a series of interspaced, linearly tapering rollers disposed along the 100 curve in the path of each outer strand and held in engagement therewith, at least some of the tapered rollers being eaph set at an angle to the direction transverse to the axial direction of the outer strand being 105 fed thereover, whereby a pre-twist imparted to each outer strand by the rotation of one of the outer strand pay-out means about the third axis is uniformly distributed through-out the length of the outer 110 strand from the outer strand pay-out means to the laying die.

2 The apparatus according to claim 1, wherein the ratio of the minimum to the maximum diameter of each tapered roller 115 is in the range of from about 1/5 to about 213.

3 The apparatus according to claim 1 or 2, wherein each series of tapered rollers are set at an angle ranging from 0 to 13 120 degrees with respect to the direction transverse to the axial direction of the outer strand being fed thereover.

4 The apparatus according to any preceding claim, wherein at least some of the 125 tapered rollers of each series are further set at an angle to the direction normal to a plane containing the curve in the path of the outer strand being fed thereover.

The apparatus according to claim 4, 130 1 565 432 wherein each series of tapered rollers are set at an angle ranging from 0 to 23 degrees with respect to the direction normal to the plane containing the curve in the path of the outer strand.

6 The apparatus according to claim 4 or 5, further comprising means for supporting each tapered roller so as to permit easy adjustment of the angular positions of the tapered roller with respect to the direction transverse to the axial direction of the outer strand being fed thereover and to the direction normal to the plane containing the curve in the path of the outer strand.

7 The apparatus according to any preceding claim, wherein each tapered roller decreases in diameter from its opposite ends toward its midpoint.

8 The apparatus according to any one of claims 1 to 6, wherein each tapered roller decreases in diameter from one of its ends toward the other end.

9 The apparatus according to any preceding claim, wherein the tapered rollers are made of material capable of offering more frictional resistance than metal to the outer strands being fed thereover.

The apparatus according to any preceding claim, wherein the core guiding means includes revolving guide frame means extending along and being rotatable about the first axis for receiving and passing therethrough the core delivered from the core pay-out means toward the laying die, and wherein the pre-twist distributing means for the core comprises a universal joint, a support member connected to an entrance end of the revolving guide frame means via the univeral joint so as to extend 40 along the core length from the core payout means to the entrance end of the revolving guide frame means, and a series of interspaced pairs of opposed guide rollers rotatably mounted on the support 45 member so as to engage the core therebetween.

11 The apparatus according to claim 10, wherein the guide rollers of the pretwist distributing means for the core are 50 concave in shape.

12 The apparatus according to claim or 11, wherein the pre-twist distributing means for the core further comprises means for reducing the centrifugal effects on the 5 s support member and the guide rollers.

13 The apparatus according to claim 10, 11 or 12, wherein the pre-twist distributing means for the core further comprises a series of interspaced pairs of 60 opposed second guide rollers rotatably mounted within the revolving guide frame means so as to engage the core therebetween.

14 The apparatus substantially as here 65 inbefore described with reference to Figures 2 to 18 of the accompanying drawings.
A A THORNTON & CO, Chartered Patent Agents, Northumberland House, 303/306 High Holborn, London, WCIV 7 LE.
Printed for Her Majesty’s Stationery Office by The Tweeddale Press Ltd Berwick-upon-Tweed, 1980.
Published at the Patent Office 25 Southampton Buildings, London, WC 2 A l AY, from which copies may be obtained.

GB31401/77A
1976-07-29
1977-07-26
Cable making apparatus

Expired

GB1565432A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

JP9173676A

JPS5316886A
(en)

1976-07-29
1976-07-29
Method of manufacturing flexible cable by nonncage type winding and twisting process

Publications (1)

Publication Number
Publication Date

GB1565432A
true

GB1565432A
(en)

1980-04-23

Family
ID=14034793
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB31401/77A
Expired

GB1565432A
(en)

1976-07-29
1977-07-26
Cable making apparatus

Country Status (5)

Country
Link

US
(1)

US4120139A
(en)

JP
(1)

JPS5316886A
(en)

DE
(1)

DE2734398A1
(en)

FR
(1)

FR2359932A1
(en)

GB
(1)

GB1565432A
(en)

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(en)

1977-02-22
1980-01-29
Phillips Petroleum Company
Apparatus and process suitable for twist-drawing a yarn

CH621371A5
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1977-07-23
1981-01-30
Rieter Ag Maschf

DE2833701C3
(en)

1978-07-28
1982-03-25
Siemens AG, 1000 Berlin und 8000 München

Device for SZ stranding of stranding elements of electrical or optical cables and lines

EP0007472B1
(en)

1978-07-28
1982-06-02
Siemens Aktiengesellschaft
Device for sz stranding strand elements of electrical or optical cables and lines

JPS56120798U
(en)

1980-02-14
1981-09-14

FR2505545A1
(en)

1981-05-07
1982-11-12
Cables De Lyon Geoffroy Delore
Multiconductor telephone cable forming machine – uses contra-rotating core supply and cable receiving drums with conductors wrapped round core and sheathing strip

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1995-09-22
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Computer driven printer

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2012-02-28
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nkt cables s.r.o.
Stranding system for stranding individual electric wires to form multi-core medium voltage cable, has liquidator, winding unit and rotary flue unit that are arranged on different horizontal planes

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2013-07-11
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Technip France

GUIDE WHEEL FOR ARMOR WIRE LAYER LAYERS

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Preheating in yarn texturing

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Conduit roller bearing

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Further development of cable assembly machines

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(en)

1970-06-29
1972-02-04
Meca Stephanoise Const

1976

1976-07-29
JP
JP9173676A
patent/JPS5316886A/en
active
Granted

1977

1977-07-25
US
US05/819,035
patent/US4120139A/en
not_active
Expired – Lifetime

1977-07-26
GB
GB31401/77A
patent/GB1565432A/en
not_active
Expired

1977-07-29
DE
DE19772734398
patent/DE2734398A1/en
not_active
Ceased

1977-07-29
FR
FR7723404A
patent/FR2359932A1/en
active
Granted

Also Published As

Publication number
Publication date

FR2359932A1
(en)

1978-02-24

US4120139A
(en)

1978-10-17

DE2734398A1
(en)

1978-02-02

FR2359932B1
(en)

1982-05-28

JPS5316886A
(en)

1978-02-16

JPS565007B2
(en)

1981-02-03

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